(x)Ubuntu : How Can I revert 2 keyboard keys on my laptop ? Or having same function for 2 different keys?

I'm using a Lenovo P14s laptop and I want to the "FN" key (with is as bottom left corner) acts same as "Ctrl" key.

How can I do this ?

So far I've tried to map FN on Ctrl key like this :

I add the following line on my local .Xmodmap file :

keycode 151 = Control_L NoSymbol Control_L

Plus I've also comment the line key <I151> { [ XF86WakeUp ] }; in /usr/share/X11/xkb/symbols/inet file.

Then xev gives me :

For CTRL key :

KeyRelease event, serial 37, synthetic NO, window 0x7800001,
    root 0x97c, subw 0x0, time 5466327, (167,-13), root:(1038,462),
    state 0x4, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

for FN key :

KeyRelease event, serial 37, synthetic NO, window 0x7800001,
    root 0x97c, subw 0x0, time 5498099, (164,-11), root:(1035,464),
    state 0x0, keycode 151 (keysym 0xffe3, Control_L), same_screen YES,
    XKeysymToKeycode returns keycode: 37
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

As it didn't work I've also add this line key <I151> { [ Control_L ] }; in /usr/share/X11/xkb/symbols/pc file and it didn't work neither

even when I comment key <LCTL> { [ Control_L ] };

(for each step I've deleted sudo rm -rf /var/lib/xkb/* and reboot)

For example I can assure you I type FN + C I don't copy a text as CTRL+C does... What am I doing wrong ?